JS摆脱功能

Question

我有看起来像这样的方法：

return AddedSoftware (software) { 
    this.softwares.map(function(soft) { 
     if(soft.id == software) { 
      return software.name; 
     } 
    }) 
} 

所以，我怎么会分手，当现在soft.id == software它遍历整个softwares它返回之前返回！

Answer 1

你会使用find()代替

return function AddedSoftware (software) { 
    let res = this.softwares.find(soft => soft.id == software); 
    // return the software's name if there's a match, or undefined 
    return res ? res.name : res; 
} 

这会给你的第一个对象符合条件。然后您可以从该对象获得software.name。从文档

摘录：

The find() method returns a value of the first element in the array that satisfies the provided testing function. Otherwise undefined is returned.